The present invention relates to the field of petroleum extraction equipment, particularly to a coiled tubing reel and a coiled tubing vehicle.
As the coiled tubing technology is developed continuously, the demand for applying the coiled tubing technology in deep well and extra-deep well operations becomes more and more urgent and frequent. Halliburton has utilized variable outer diameter coiled tubing technique to improve the maximum vertical depth of operation to 10,000 m or above; Schlumberger and other companies have many success cases of coiled tubing operation in deep wells and extra-deep wells in depth greater than 6,000 m. However, the reels used by those companies for deep-well large-diameter coiled tubing operation are ultra-large, ultra-wide, and ultra-high. For example, the outer diameter of a reel for coiled tubing in 2″ outer diameter with 7,600 m capacity is as large as 4.5 m. Such coiled tubing reels can't be transported successfully under the limited road conditions in China.
In addition, compared with small reels or large reels without limited structural dimensions, extra-deep well coiled tubing reels involve many problems in terms of driving, owing to the high strength grade, large pipe diameter, great wall thickness, great length, heavy weight, and limited structural dimensions of coiled tubing wound on the coiled tubing reels; specifically, the existing reels for coiled tubing operation usually use two driving modes, wherein, one driving mode is a directly driving structure using a motor reducer, but the torque transferred in this driving mode is low and can't meet the winding requirement; the other driving mode is to use chain transmission structure with a motor reducer, but the structural dimensions are large, the transmission is not steady, and the chain may be worn easily.
Therefore, there is a demand for a coiled tubing reel that can increase the coiled tubing winding capacity, provides high transmission torque, and operates smoothly and steadily at a low speed, while meeting the requirement for transportation dimensions.
To overcome the drawbacks of low coiled tubing winding capacity, low transmission torque, and unsteady transmission in existing coiled tubing reels in the prior art while meeting the requirement for transportation dimensions, one object of the present invention is to provide a coiled tubing reel, which can increase the coiled tubing winding capacity, provides high transmission torque, and operates smoothly and steadily at a low speed while meeting the requirement for transportation dimensions.
Another object of the present invention is to provide a coiled tubing vehicle that includes the coiled tubing reel described above.
To attain the objects described above, in one aspect, the present invention provides a coiled tubing reel, which comprises a reel body assembly configured to wind a coiled tubing and a driving component configured to drive the reel body assembly, wherein, the reel body assembly comprises a reel body, a reel shaft, a transmission gear, and a first bearing block and a second bearing block that are oppositely arranged and spaced from each other, wherein the reel body is fixedly fitted on the reel shaft, the two ends of the reel shaft are rotatably arranged on the first bearing block and the second bearing block respectively, the transmission gear is fixed with respect to the reel shaft to drive the reel shaft to rotate, the driving component is fixedly arranged on the first bearing block and is at least partially disposed inside the reel body, and the driving component comprises a driving gear that is engaged with the transmission gear.
In the technical scheme described above, since the transmission gear is fixed with respect to the reel shaft to drive the reel shaft to rotate, the driving component comprises a driving gear engaged with a transmission gear, and the driving component is fixedly arranged on the first bearing block and at least partially disposed inside the reel body, such that the coiled tubing reel has a compact structure and is small in size, the width of the reel body in the axial direction can be increased while the requirement for transportation dimensions is met, and thereby the coiled tubing winding capacity can be increased; besides, since a gear driving mode is used, the transmission torque is high, and the coiled tubing reel can operate smoothly and steadily at a low speed.
In a second aspect, the present invention provides a coiled tubing vehicle, which comprises a vehicle body and the above-mentioned coiled tubing reel mounted on the vehicle body, wherein the first bearing block and the second bearing block are fixed with respect to the vehicle body respectively.
Other features and advantages of the present invention will be further detailed in the embodiments hereunder.
The accompanying drawings are provided here to facilitate further understanding on the present invention, and constitute a part of this document. They are used in conjunction with the following embodiments to explain the present invention, but shall not be comprehended as constituting any limitation to the present invention. In the figures:
1—reel body assembly; 11—reel body; 111—reel support; 1111—annular cylinder; 1112—radial column; 1113—axial column; 1114—circumferential column; 112—spoke wheel; 12—reel shaft; 13—transmission gear; 14—first bearing block; 15—second bearing block; 16—housing; 2—driving component; 21—driving gear; 22—motor; 23—reducer; 3—frame-shaped base; 4—braking component; 41—mounting base; 42—slide block; 43—friction disk; 44—screw rod; 45—supporting member; 46—lock nut; K—dovetail block; 47—stopper; T—flange; 5—tubing aligner assembly; 51—first linking arm; 52—second linking arm; 53—rhombic shaft; 54—first sprocket; 55—second sprocket; 56—forced alignment motor; 57—slide tongue box assembly; 58—roller bogie; 59—adjustable counter; 50—lubricant box; 6—clutch component; 61—driving portion; 611—driving shaft; 612—driving sprocket; 62—driven portion; 621—driven shaft; 622—driven sprocket; 63—clutch portion; 64—switching portion; 7—elevating component; 8—hoisting component; 9—container locking base; P1—internal manifold; P2—external manifold; F—check valve.
Hereunder some embodiments of the present invention will be detailed with reference to the accompanying drawings. It should be understood that the embodiments described here are only provided to describe and explain the present invention, but shall not be deemed as constituting any limitation to the present invention.
In the present invention, unless otherwise specified, the terms that denote the orientations are used as follows, for example: “top”, “bottom”, “left” and “right” usually refer to “top”, “bottom”, “left” and “right” as shown in the accompanying drawings; “inside” and “outside” refer to inside and outside in relation to the profiles of the components.
In one aspect, the present invention provides a coiled tubing reel, which comprises a reel body assembly 1 configured to wind a coiled tubing and a driving component 2 configured to drive the reel body assembly 1, wherein, the reel body assembly 1 comprises a reel body 11, a reel shaft 12, a transmission gear 13, and a first bearing block 14 and a second bearing block 15 that are oppositely arranged and spaced from each other, wherein the reel body 11 is fixedly fitted on the reel shaft 12, the two ends of the reel shaft 12 are rotatably arranged on the first bearing block 14 and the second bearing block 15 respectively, the transmission gear 13 is fixed with respect to the reel shaft 12 to drive the reel shaft 12 to rotate, the driving component 2 is fixedly arranged on the first bearing block 14 and is at least partially disposed inside the reel body 11, and the driving component 2 comprises a driving gear 21 that is engaged with the transmission gear 13, and preferably, the driving component 2 further comprises a motor 22 and a reducer 23 that is connected between the motor 22 and the driving gear 21 and fixedly arranged on the first bearing block 14, and at least a part of the structure of the reducer 23 is disposed inside the reel body 11. In addition, the driving component 2 may be fixedly connected to the first bearing block 14 by bolts.
In the technical scheme described above, as shown in
In view that the transmission gear 13 is large in size and it is inconvenient to directly fix the transmission gear 13 to the reel shaft 12, preferably, the reel body assembly 1 comprises a flange that is fixedly fitted on the reel shaft 12 and fixedly connected to the reel body 11, so that the transmission gear 13 can be fixed with respect to the reel shaft 12 conveniently. The flange may be connected to the gear shaft 12 and the reel body 11 (e.g., radial columns 1112 described below) by welding, the transmission gear 13 may be fitted on the reel shaft 12 and fixedly connected to the flange. For example, the transmission gear 13 may be fixedly connected to the flange by bolts. In addition, to reduce the wear between the driving gear 21 and the transmission gear 13 and make the transmission more smooth and steady, as shown in
Furthermore, to fixedly connect the flange to the reel body 11 conveniently and reduce the weight of the reel body 11 so as to increase the weight of wound coiled tubing, as shown in
To further increase the coiled tubing winding capacity of the reel body 11, as shown in
The reel body 11 may produce high rotational inertia impact under road conditions in the transportation process of the coiled tubing reel, and, if chain tighteners are used to fix the reel body 11, the chains and hangers of the chain tighteners may be deformed or broken easily, and consequently the reel body 11 can't be fixed reliably. In view of that problem, to fix the reel body 11 reliably, as shown in
Wherein, preferably, as shown in
Furthermore, to increase the contact area between the mounting base 41 and the slide block 42 and enable the mounting base 41 and the slide block 42 to be in slide-fit with each other reliably via the slide track structure, as shown in
In addition, to enable one end of the screw rod 44 to be limited inside the slide block 42 in the axial direction and rotate with respect to the slide block 42, as shown in
As shown in
Usually a mechanical overrun clutch is used for switchover between automatic tubing alignment and forced tubing alignment in coiled tubing reels at present. Such friction clutch controls the magnitude of the generated friction moment by means of the amount of compression of a Belleville spring, and the friction moment is greater than the moment required to drive the rhombic shaft 53 of the tubing aligner assembly 5 to rotate and smaller than the driving moment of the forced alignment motor 56. The amount of compression of the Belleville spring is adjusted by means of a bolt, but the bolt may get loose and the friction disk may be worn during use. Therefore, manual adjustment is often required. However, field adjustment is inconvenient and unsafe, and the magnitude of the friction moment is difficult to control. Especially, for high-strength large-diameter coiled tubing used in deep wells, it is more difficult to control the friction moment. Hence, it is desirable to develop a clutch component 6 applicable to alignment of high-strength coiled tubing. As shown in
Further preferably, the driving portion 61 comprises a driving shaft 611 and a driving sprocket 612 mounted on the driving shaft 611; for example, the driving sprocket 612 is fitted on an outer end of the driving shaft 611 that is away from the driven portion 62, an end plate in diameter greater than the diameter of the driving shaft 611 may be mounted on the outer end of the driving shaft 611, and the end plate is fixedly connected to the driving shaft 611 by bolts to prevent the driving sprocket 612 from sliding off the driving shaft 611; the reel shaft 12 is provided with a transmission sprocket, and the driving sprocket 611 is connected to the transmission sprocket via chain; the driven portion 62 comprises a driven shaft 621 and a driven sprocket 622 mounted on the driven shaft 621; for example, the driven sprocket 622 is fitted on the outer end of the driven shaft 621 that is away from the driving portion 61, an end plate in diameter greater than the diameter of the driven shaft 621 may be fitted on the outer end of the driven shaft 621 via threads to prevent the driven sprocket 622 from sliding off the driven shaft 621, a hole in communication with the clutch portion 63 for lubricant flow may be arranged in the end surface of the outer end of the driven shaft 621, and the hole may be sealed by means of a check valve F; the tubing aligner assembly 5 comprises a first sprocket 54 and a second sprocket 55 that are fixedly connected to the two ends of the rhombic shaft 53 respectively, and the driven sprocket 621 is connected to the first sprocket 54 via chain; the tubing aligner assembly 5 is provided with a forced alignment motor 56, and the forced alignment motor 56 is connected to the second sprocket 55 via chain. In addition, a slide tongue box assembly 57 is fitted on the rhombic shaft 53, a roller bogie 58 is fixedly connected on the slide tongue box assembly 57, the first linking arm 51 and the second linking arm 52 are provided with slide tracks that extend in the same direction as the rhombic shaft 53 to guide the roller bogie 58 to slide, and an adjustable counter 59 and a lubricant box 50 are mounted on the roller bogie 58. Quick switchover between automatic tubing alignment and manual forced tubing alignment can be realized via the clutch component 6, and thereby manual adjustment can avoided, adjustment time can be reduced, labor intensity can be decreased, and operation convenience, safety and reliability can be improved.
As shown in
The operating process of the coiled tubing reel in the present invention is as follows: the hydraulic motor 22 is driven by hydraulic power (i.e., supplied by a power system) to drive the driving gear 21 via the reducer 23 to rotate, the driving gear 21 is engaged with the transmission gear 13 that is fixed with respect to the reel shaft 12 and thereby drives the reel body 11 that is fixedly fitted on the reel shaft 12 to rotate; in the case of automatic tubing alignment, the driven portion 62 and the driving portion 61 of the clutch component 6 are driven by the hydraulic power at the same time to engage with each other via the clutch portion 63 (i.e., the clutch portion 63 is in an engaged state), the reel shaft 12 rotates and drives the transmission sprocket on it to rotate, the transmission sprocket drives the driving sprocket 612 on the driving shaft 611 via chain to rotate and drive the driven shaft 621 and the driven sprocket 622 on the driven shaft 621 to rotate together, the driven sprocket 622 drives the first sprocket 54 via chain to rotate, and thereby the rhombic shaft 53 rotates, so that the slide tongue box assembly 57 and the roller bogie 58 move to and fro along the length direction of the rhombic shaft 53, and drive the coiled tubing mounted on the adjustable counter 59 to align uniformly on the reel body 11. In the case that the coil tubing is not aligned orderly, the clutch component 6 is driven by hydraulic power to drive the driven shaft 621 and the driving shaft 611 to disengage from each other via the clutch portion 63; now the driving sprocket 612 and the driven sprocket 622 are not in association with each other; then, the forced alignment motor 56 on the tubing aligner assembly 5 is driven by hydraulic power to drive the second sprocket 55 and the rhombic shaft 53 to rotate, so that the slide tongue box assembly 57 and the roller bogie 58 are driven to move to and fro in the length direction of the rhombic shaft 53; after the coil tubing is aligned orderly, the rotation of the forced alignment motor 56 is stopped, and the clutch component 6 is driven by hydraulic power to drive the driven shaft 621 and the driving shaft 611 to engage with each other via the clutch portion 63, and thereby automatic tubing alignment is enabled.
In a second aspect, the present invention provides a coiled tubing vehicle, which comprises a vehicle body and the above-mentioned coiled tubing reel mounted on the vehicle body, wherein the first bearing block 14 and the second bearing block 15 are fixed with respect to the vehicle body respectively. Since the coiled tubing vehicle includes the above-mentioned coiled tubing reel, it has all or at least a part of the technical effects of the coiled tubing reel. Please see the above description for the details and effects of the specific technical scheme.
While the present invention is described above in detail in some preferred embodiments with reference to the accompanying drawings, the present invention is not limited to those embodiments. Various simple variations may be made to the technical scheme in the present invention, including combinations of the specific technical features in any appropriate form, within the scope of the technical ideal of the present invention. To avoid unnecessary repetition, the possible combinations are not described specifically in the present invention. However, such simple variations and combinations shall also be deemed as having been disclosed in the present invention and falling in the scope of protection of the present invention.
Number | Name | Date | Kind |
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20030071160 | Cain | Apr 2003 | A1 |
20040244993 | Crawford | Dec 2004 | A1 |
Number | Date | Country |
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103711448 | Apr 2014 | CN |